314 



OSWALD S. LOWSLEY 



tures bound together by connective and muscular tissue in a 

 very characteristic way approach the urethra on a gradual slant 

 maintaining the globe-like appearance shown in fig. 4, pushing 

 the floor of the urethra up into its lumen, forming the verum 

 montanum and causing the urethra to assume an inverted semi- 

 lunar appearance. The ejaculatory ducts run parallel to the 

 floor of the urethra for a considerable distance and then ascend 

 vertically to empty on the sides of the verum montanum. The 



Venfral or Alienor Lobe. 



Lalerdl Lob<C^ 





Lateral 



t. 



Ejaculafory Due 





Prosfalicos . 



Fig. 4 12.5 cm. human fetus. Four months. Showing rather definite separa- 

 tion of the middle lobe 'from the lateral lobes. 



utriculus prostaticus in this series is very irregular in shape, being 

 throughout most of its length in the shape of an inverted Y and 

 giving the appearance of two tubes which have fused at their 

 upper pole and not at the lower. Its opening into the urethra 

 is below those of the ejaculatory ducts and there is a blind end 

 extending a short distance down in the verum montanum under 

 the floor of the urethra. 



